摘要
微电网孤岛运行时,采用传统下垂控制策略的微电网频率因其输出功率的变化而偏离额定值,为此,提出一种微电网下垂系数自调节控制策略。微网内各微源由一致性算法获得下垂系数自调节值,实现微电网频率无静差,同时确保有功功率按额定容量分担负荷,在PSCAD中搭建微网模型,并与传统下垂控制仿真结果对比,表明了控制策略的有效性。
For islanded microgrids, the microgrid system frequency with traditional droop control often deviates from the rated frequency due to the variation of output power. Therefore, a self-adjusting droop coefficient control strategy for microgrids is proposed. Through the consistency algorithm, the micro-power source in the micro-grid obtains the self-adjusting amount of the droop coefficient to achieve no static difference in the frequency of the micro-grid, while ensuring that the active power shares the load according to the rated capacity. A microgrid simulation model is built in PSCAD, and the simulation result verifies the effectiveness of the control strategy through comparison with that of traditional droop control.
作者
王岳
杨国华
庄家懿
潘欢
邹玙琦
韩世军
WANG Yue;YANG Guohua;ZHUANG Jiayi;PAN Huan;ZOU Yuqi;HAN Shijun(Department of Electrical Engineering and Automation,Ningxia University,Yinchuan 750021,China.;Ningxia Key Laboratory of Electrical Energy Security,Yinchuan 750021,China)
出处
《中国电力》
CSCD
北大核心
2020年第10期187-191,共5页
Electric Power
基金
国家自然科学基金资助项目(含分布式电源的复杂电网脆弱性综合评估与同步控制,61763040)
宁夏自治区重点研发计划资助项目(2018BFH03004)
宁夏自治区自然科学基金资助项目(NZ17022)。
关键词
微电网
下垂控制
一致性算法
频率无静差
功率分配
micro-grid
droop control
consensus algorithm
zero-error frequency regulation
power sharing